<template>
  <header class="header">
    <!-- 头部的第一行 -->
    <div class="top">
      <div class="container">
        <div class="loginList">
          <p>尚品汇欢迎您！</p>
          <!-- 未登录 -->
          <p v-if="!token">
            <span>请</span>
            <!-- 声明式导航必须要有to属性 -->
            <router-link to="/login">登录</router-link>
            <router-link to="/register" class="register">免费注册</router-link>
          </p>
          <!-- 已登录 -->
          <p v-if="token">
            <a href="#">{{name}}</a>
            <a href="#" class="register available" @click.prevent="logout">退出登陆</a>
          </p>
        </div>
        <div class="typeList">
          <router-link to="/center/myOrder" class="available">我的订单</router-link>
          <router-link to="/shopcart" class="available">我的购物车</router-link>
          <a href="###">我的尚品汇</a>
          <a href="###">尚品汇会员</a>
          <a href="###">企业采购</a>
          <a href="###">关注尚品汇</a>
          <a href="###">合作招商</a>
          <a href="###">商家后台</a>
        </div>
      </div>
    </div>
    <!--头部第二行 搜索区域-->
    <div class="bottom">
      <h1 class="logoArea">
        <!-- 声明式导航 -->
        <router-link class="logo" to="/home">
          <img src="./images/logo.png" alt />
        </router-link>
      </h1>
      <div class="searchArea">
        <form action="###" class="searchForm">
          <input
            type="text"
            id="autocomplete"
            class="input-error input-xxlarge"
            placeholder="已完成：登陆/注册，我的订单，购物车列表，微信二维码支付，全部商品分类，搜索框"
            v-model="keyword"
          />
          <button class="sui-btn btn-xlarge btn-danger" type="button" @click="goSearch">搜索</button>
        </form>
      </div>
    </div>
  </header>
</template>

<script >
import { mapState, mapGetters } from 'vuex'
import { setCookie, getCookie, delCookie } from '@/utils/cookie'
export default {
  name: 'Header',
  data () {
    return {
      keyword: ''
    }
  },
  computed: {
    ...mapState({
      token: state => state.user.token
    }),
    ...mapGetters(['name'])
  },
  methods: {
    // 编程式路由，搜索按钮的回调函数需要向search路由跳转
    goSearch () {
      // 路由传参
      // 1.字符串传参（简单）,包含了params和query传参
      // this.$router.push("/search/" + this.keyWord + "?k=" + this.keyWord)
      // 2.模板字符串传参
      // this.$router.push(`/search/${this.keyWord}?k=${this.keyWord.toUpperCase()}`)
      // 3.对象写法
      // 给push方法传递响应的成功、失败回调函数，可以捕获到当前错误，从而解决navigationDupricated问题
      let location = {
        // params传参不能用path属性，只能使用name进行路由跳转
        name: "search",
        // params使用undefined可以使得params无论是否传递参数或者参数是空都能保证URL不出错
        params: {
          keyword: this.keyword || undefined
        },
        query: this.$route.query
      }
      this.$router.push(location)

    },
    // 退出登陆状态
    async logout () {
      // 1.需要发请求，通知服务器退出登陆【清除掉token】
      try {
        await this.$store.dispatch('logout')
        // 2.清除掉本地获取的token、userInfo
        delCookie('token')
        // 3.退出成功后路由跳转回注册页
        this.$router.push('/login')
      } catch (error) {
        alert(error)
      }
    }
  },
  mounted () {
    this.$bus.$on('clear', () => this.keyword = undefined)
  },
  beforeDestroy () {
    this.$bus.$off('clear')
  }
}
</script>

<style lang="less" scoped>
.header {
  & > .top {
    background-color: #eaeaea;
    height: 30px;
    line-height: 30px;

    .container {
      width: 1200px;
      margin: 0 auto;
      overflow: hidden;

      .loginList {
        float: left;

        p {
          float: left;
          margin-right: 10px;

          .register {
            border-left: 1px solid #b3aeae;
            padding: 0 5px;
            margin-left: 5px;
          }
        }
      }

      .typeList {
        float: right;

        a {
          padding: 0 10px;

          & + a {
            border-left: 1px solid #b3aeae;
          }
        }
      }
    }
  }

  & > .bottom {
    width: 1200px;
    margin: 0 auto;
    overflow: hidden;

    .logoArea {
      float: left;

      .logo {
        img {
          width: 175px;
          margin: 25px 45px;
        }
      }
    }

    .searchArea {
      float: right;
      margin-top: 35px;

      .searchForm {
        overflow: hidden;

        input {
          box-sizing: border-box;
          width: 490px;
          height: 32px;
          padding: 0px 4px;
          border: 2px solid #ea4a36;
          float: left;

          &:focus {
            outline: none;
          }
        }

        button {
          height: 32px;
          width: 68px;
          background-color: #ea4a36;
          border: none;
          color: #fff;
          float: left;
          cursor: pointer;

          &:focus {
            outline: none;
          }
        }
      }
    }
  }

  .available {
    color: #ea4a36;
  }
}
</style>
